Ornamenting glass.



No. 723,139. ,PATENTED MAR. 17, 1903.

J. M. GONROY. V ORNAMENTING GLASS.

APPLICATION FILED OUT. 22, 1902.

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FIG! 2 No. 723,139. PATENTED MAR. 17, 1903;

J. M. GONROY.

ORNAMENTING GLASS.

APPLICATION FILED 00. 22, 1902.

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ORNAMENTING GLASS.

APPLICATION 11.31) our. 22, 1902. no MODEL. 4 SHEETS-SHEET 3.

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PATENTED MAR. 17,1903.

No. 723,139i

J. M. CONROY.

ORNAMENTING GLASS. APPLICATION FILED 001222, 1902.

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To all whom it may concern:

Be it known that I, JOHN M. CONROY, a citizenof the United States,residing at Allegheny, in thecounty of Allegheny and Statei ofPennsylvania, have invented or discovered 1 certain new and usefulImprovements in Or- I namenting Glass, of which improvements thefollowing is a specification. The invention described herein relates tocertain improvements in the art of shaping or} producingau ornamentaleffect on the edges of glass articles,such as mirrors, 850., and hasforits object the breaking away orremovalof portion s'iof the edges,more espe-;' cially with reference to the production ofin .clinedscallops or indentations along the edge; j of the article, said scallopsbeing atan angle lessthana right angle with the surfaces of] l i thearticle. i 2o. The invention is hereinafter more scribed and claimed. il i b In the accompanying drawings, forming a: part of thisspecification, Figurel is a plan. view of a form of apparatusfor thepractice of my invention. Fig. 2 is a sectional elevation of the same.Fig. 3 is a plan view of another form of apparatus. Figs. at and 5' arefront and sideQelevations of the same. Fig. 6 is asectionalelevation.Fig. 7 is an elevation illustrating a modification in the shape of thedrum, and Fig. 8 is a diagrammatic viewill-ustrative of the fracture ofthe glass. j l In the practiceof my invention the glassis struck a sharpblow with a suitable tool at a point closely adjacent to its edge, thedirec: tionof impact beingatjan angle to the surflface ofthe article. Asthe result of such a blow a piece'ofglass is so broken out from theedgeand opposite side of the article as to. j leave a scallop extendingat an angle from. theedge on which the blow was struck in wardlytoapointsome distance from theopositee A series of scallops can be emauneradjacent to each other, hescallops beingdependent upon l cebetween, the points at whichjthe blowsare struck and the regularity ofthe spacing of the blows. I have found that by evenly spacing theypointsof impact with the t tooland making the blows uniform, or pracrun y(it-E tically so, as to force, the pieces of glass ATENT Fries,

I JOHNM. coNRo orI LLnennNY, PENNSYLVANIA. 3

ORNAM ENTI NG G LASS.

SPECIFICATION forming part of Letters Patent 0. 723,139, dated Marcia.17, 1903. l

Application filedOctober 22, 1902. Serial No. 128,222. (No model)removed are quite uniform in size and shape and that there is verylittle splintering of the.

glass. Except at and adjacent to the point of impact of the-tool nosharp points or cutting edges are formed on the article, although suchsharppoints or edges are found in the pieces of glass removed.

A convenient form of apparatus for orna; mentin'g straight edges isshown in Figs. 1 and 2 and consists ofa power-driven drum 1, having aseries of pins 2 projecting from its pe- I I now believe, to theopportunity afforded for the recovery of the glass from the strainsproduced by one blow before being subjected to the next. As'will bereadily understood, the

time intervalcan be had by spacing the pins farther apart and increasingthe speed of the drum or by placing the pins nearer together anddecreasing the speed of the drum.

In Figs. 1 and 2 I have shown my preferred form or construction ofmechanism for ornamenting-e. g., scalloping articles having straightedges. width of face at least equal to the length of the edge to beoperated on, and one or more rows of pins 2 are secured in the peripheryof the drum in such manner that the pins will strike successively on thearticle.

ing of the pins around the periphery will be dependent upon theperipheral speed of the drum, or the speedof the drum is regulated inaccordancewith the spacing of the pins, so that an opportunity may beafforded for width of the pins and theirspacing across the face of thedrum is regulated by the wid thof 1 The drum 1 is made with a Thespacthe recovery of the glass from the strains pro duced by one pinbefore being subjected to the action of another pin. -The diameter or 5on the frame of the machine and arranged,

preferably, in such relation to the axis of the drums that the pins willbe moving away from the bar or article resting thereon at the time ofimpingement on the article. I have found that it is desirable that therest-bar should present a firm and uniform support for the glass toprevent breakage of the articles. The article is held by the operator insuch position that the pins will strike on the article closely adjacentto the edge at an angle of about forty-five degrees to the upper surfaceof the article, as clearly shown in Fig. 2, and will move down and awayfrom the article. In this movement the pin, which by preference shouldnot strike much more than one thirty-second of an inch from the edge ofthe article, does not merely nick the glass, but forces out a chip,theconoidal plane of fracture extending inwardly from-the edge struck at anangle of about forty-five degrees tothe opposite face of the article, asshown in Figs. 2 and 8. As before stated, the successive chips removedare substantially uniform in shape and size. In practice the operatorpresses the edge of the article against the periphery of the drum at thedesired angle, the pins being set to project about a thirty-second of aninch from the periphery. It is preferred that the ends of the pins bebeveled, as shown, to form a comparatively sharp striking edge and topermit the back edge of the pin to clear the edge of the article. Theposition of the bar or support 3 depends upon the thickness of the glassand should for best results be so adjusted that the line of support ofthe glass should coincide or be closely adjacent to the line where theplane of fracture intersects the under su rface of the glass.

As shown in Fig. 7, the periphery of the drum can be made to conform tothe edge contour of the article; but it is preferred when operating onarticles having curved edges to employ a construction similar to thatshown in Figs. 3 to 6. As shown therein, the drum is provided with asingle pin and the article is secured on a table or bearing portion 4,which is shifted step by step to bring successive portions into theplane of movement of the pin 2. The table 4 is carried by ashaft 6,driven bythe shaft 7 through the bevel-gears 8. A ratchet-wheel 9 issecured on the shaft 7, and the pawl 10 is mounted on an arm 11,pivotally mounted on the shaft 7. The back-and-forth movement of the armis eifected through the link 12 by an eccentric-pin 13, carried by theshaft 14, on which the drum 1 is mounted. By this construction the tablecarrying ,the article will be moved forward a predetermined distance oneach revolution of the drum and pin, such distance being proportional tothe desired width of scallops. In order to permit of varying the feed ofthe table, the pin 13 is adjustably mounted, as shown in Fig. 5. Thearticle is clamped on the table by a plate 15, loosely mounted on ascrew 16, passing through the cross-bar 1'7, secured to the frame of themachine. In order to insure'that the axis of the plate 15 shall coincidewith the axis of the table 4, a disk 18 is loosely mounted on the hub ofthe clamping-plate 15 and is provided with a downwardly-projectingflange 19, which when the plate is screwed down passes inside of the rim20 on the bed 21, which supports the table 4, as shown in Fig. 6.

In lieu of the construction shown in Figs. 3 to 6 the periphery of thedrum may be given a contour the reverse of thatof the article, as shownin Fig. 7,- and provided with pins spaced, as shown in Figs. 1 and 2,with reference to successive action and arranged to impinge on thearticle at an angle of about forty-five degrees.

As the planes of fracture intersect the surface of the article at anapproximately uniform distance from the edge of the article, my improvedmethod may be employed as a preliminary step in beveling the edges ofglass plates, as the major portion of glass required to be removed toform the bevel can be chipped 06 very rapidly by my method,

so that the comparatively slow removal by grinding would be necessaryonly for straight-v I ening and smoothing the bevel.

While I have shown with some particularity preferred forms of apparatusfor carrying out my improved method, no claims are made herein to suchapparatus, as the same forms the subject-matter of an application,Serial No. 137,256, filed December 31, 1902.

I claim herein as my invention- 1. As.an improvement in the art ofshaping the edges of glass articles, the method herein described whichconsists in removing by blows at successive points closely adjacent tothe edge, the edge and a portion of the opposite side of the article inpieces approximately uniform in quantity, substantially as set forth.

2. As an improvement in the art of shaping the edges of glass articles,the' method herein described, which consists in removing by blows atsuccessive points closely adjacent to the edge pieces approximatelyuniform in shape from the edge and a portion of the op-' posite side,substantially as set forth.

In testimony whereof I have hereunto set my hand.

' JOHN M. OONROY. Witnesses! DARWIN S. WOLCOTT, F. E. GAITHER.

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